The programme uncovers the story of one of the finest bombers of the Second World War, fighting at the core of a campaign to defeat the Third Reich. The Lancaster was the only aircraft capable of carrying the “Tallboy” and “Grand-slam” bombs created by Barnes Wallis and it is the aircraft that carried out the ambitious Dambuster’s Raid, with another of Wallis’ inventions, the Bouncing Bomb. It was crucial in low level night-time raids many miles inside Germany; striking at industrial and military targets; before reverting to making massive food drops on occupied territory that saved the lives of thousands at the end of the war.